String rotation in Java.

solutions/java/StringRotation.java

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+public class StringRotation {
+
+	public static void main(String[] args) {
+		// TODO Auto-generated method stub
+		StringRotation sr = new StringRotation();
+		System.out.println(sr.isRotation("ABCD", "BCDA"));
+	}
+
+	public boolean isRotation(String one, String two) {
+		/**
+		 * This code checks if one is a rotation of two The way it works is -
+		 * concatenate the original string with itself, and check if the rotated
+		 * string is contained in it. For example : ABCD is contained in BCDABCDA
+		 */
+		return (two + two).contains(one);
+	}
+}